1 /* 2 * Copyright (c) 2009, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 /* 25 * @test 26 * @bug 6855164 27 * @summary SIGSEGV during compilation of method involving loop over CharSequence 28 * 29 * @run main/othervm -Xbatch compiler.loopopts.Test6855164 30 */ 31 32 package compiler.loopopts; 33 34 public class Test6855164 { 35 public static void main(String[] args) throws Exception { 36 StringBuffer builder = new StringBuffer(); 37 38 for(int i = 0; i < 100; i++) 39 builder.append("I am the very model of a modern major general\n"); 40 41 for(int j = 0; j < builder.length(); j++){ 42 previousSpaceIndex(builder, j); 43 } 44 } 45 46 private static final int previousSpaceIndex(CharSequence sb, int seek) { 47 seek--; 48 while (seek > 0) { 49 if (sb.charAt(seek) == ' ') { 50 while (seek > 0 && sb.charAt(seek - 1) == ' ') 51 seek--; 52 return seek; 53 } 54 seek--; 55 } 56 return 0; 57 } 58 }